cad & cam introduction

CECOS University of IT &

Emerging Sciences

ME-2011AMechanical Engineering

CAD/CAMBY

Engr.M Irfan KhanLecture No-1

CECOS UNIVERSITY of IT & EMERGENCY 2

HURRAH

CAD: Computer Aided DesignCAM: Computer Aided Manufacturing

Two credit hours course

Course Out linesCAD• Fundamentals of CAD• Hardware in CAD• Computer Graphics• Software and data base, Mathematical

elements of CAD• Finite Element analysis.

Course Out lines (cont….)CAM• Conventional Numerical Control• NC part programming, • Computer controls in NC

Evaluation Criteria for the Theory Course (Three Credit Hours) 25% of the Sessional marks will be allocated for the Quizzes and Assignments.6 AssignmentsBest 6-Assignment will be Graded 12.5 Marks6 QuizzesBest 6-Quizzes will be Graded 12.5 Marks25% of the Sessional marks will be allocated for the two (2) sessional tests.

1st sessional test(after 7th-weeks) 10 Marks2nd sessional test(after 12th-weeks) 15 Marks

50% marks will be allocated for the Final examination 50 Marks

Course contents

• Lectures• Assignments• Quizzes• Recommended books• Class discussions

Computer Aided Design

What is Design…???• Another definition for design is a roadmap or a strategic approach for someone to achieve a unique

expectation. It defines the specifications, plans, parameters, costs, activities, processes and how and what to do within legal, political, social, environmental, safety and economic constraints in achieving that objective

The Design Process – An Engineering Activity

1. Need2. Concept3. Modeling and Simulation4. Analysis – FEM (Geometrical

Data)5. Optimize – Shape /

Structure / Topology6. Evaluate – testing /

Inspection / Comparison7. Communicate – prepare

drawings and details

Taking assistance of Computers in Design

1. Manual Design2. Geometric Models and

Graphics3. Move / Animate / Visualise4. Use Analysis tools and

software5. Optimize – Maximize /

minimize the objectivefunctions: Structure, Shape,

Topology6. Evaluate – test and check

the model7. Communicate – Drafting and

detailing

Basic definitions

Engineering design Geometric modeling

Computer graphics

CAD

Basic definitions• CAD: Computer-Aided Design is the technology

concerned with the use of computer systems to assist in the creation, modification, analysis, and optimization of a design.

• CAM: Computer-Aided Manufacturing is the technology concerned with the use of computer systems to plan, manage, and control manufacturing operations.

• CAE: Computer-Aided Engineering is the technology concerned with the use of computer systems to analyze CAD geometry, allowing the designer to simulate and study how the product will behave.

Simple CAD/CAE/CAM product life cycle

More about CAD & CAM

DesignAnalysis

Visualization

Basic components of a CAD system

• A CAD system consists of • IT hardware (H/W), • Specialised software (S/W) (depending on the

particular area of application, The core of a CAD system is the S/W, which makes use of graphics for product representation)

• Peripherals, which in certain applications are quite specialised.

• Databases for storing the product model and drives the peripherals for product presentation.

• The use of CAD does not change the nature of the design process but as the name states it aids the product designer. The designer is the main actor in the process, in all phases from problem identification to the implementation phase

THE END

• What you have learned today…???(Fundamentals of CAD)